{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 499,
    "wlbName" : "31/5-2 R",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\u003cp\u003eWell 31/5-2 R is a re-entry of well\r\n31/5-2. The overall purpose of these wells was to test the reservoir quality, the\r\noil/gas columns, and the hydrocarbon/water contact in the area. The objective\r\nof the re-entry was to undertake drill stem testing of the reservoir.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 31/5-2 was re-entered\r\n(31/5-2 R) with the semi-submersible installation Treasure Saga. The rig\r\narrived location on 10 June 1984 but due to problems with anchor handling, and\r\non establishing 4 guidelines to well head before running BOP on riser the well was\r\nnot re-entered before 13 June. After the bridge plug was retrieved at 642 m the\r\nhole was circulated with seawater and finally displaced with CaCl brine. Due to\r\nthe complexity of the tests, equipment failures and an unplanned third test,\r\nthe duration of the testing period was 67 days, 42 days longer than prognosed. \u003c/p\u003e\r\n\r\n\u003cp\u003eAfter testing the well was permanently\r\nabandoned on 30 August 1984 as an oil and gas appraisal.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eThree drill stem tests were performed.\u003c/p\u003e\r\n\r\n\u003cp\u003eDST 1 tested the interval 1577 - 1581 m and\r\nproduced maximum 1000 m3 oil + water /day trough a 25.4 mm choke. The GOR was\r\n53 Sm3 /Sm3 at 10.3 bar and 60 deg C throughout the test. The corresponding WHP\r\nwas 22 bar with a nitrogen injection rate of 11.5 m/min. The water production\r\nstarted in the beginning and increased continuously through the test. The final\r\nwater cut was 62%. The oil density was 0.896 g/cm3 and the gas gravity (air =\r\n1) was 0.66.\u003c/p\u003e\r\n\r\n\u003cp\u003eDST 2 tested the interval 1574 - 1576 m and\r\nproduced maximum 1290 m3 oil + water/day through 44.5 + 23.8 mm choke. The GOR\r\nwas 53 Sm3 /Sm3 with separator conditions of 3.8 bar and 29degC. The\r\ncorresponding WHP was 15 bar. The water production started after 50 hours of\r\nflow and the water cut increased to 34%. The oil density was 0.89 g/cm3 and the\r\ngas gravity (air = 1) was 0.66.\u003c/p\u003e\r\n\r\n\u003cp\u003eDST 3 tested the interval 1546.5 - 1554.5\r\nm produced",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}